Gripper for job-presses



(No Model.)

G. W. BANKS. GRIPPER FOR JOB PRBSSES.

No. 439.462. Patented Oct. 28, 1890.

II; I

High V m win h t 4 h 2/- WITNESSES.

iiw I B) f? A TTORNEYS UNITED STATES PATENT OFFICE.

GEORGE V. BANKS, OF PHILADELPHIA, PENNSYLVANIA.

GRIPPER FOR JOB-PRESSES.

SPECIFICATION forming part of Letters Patent No. 439,462, dated October28, 1890.

Application filed April 10, 1890. Serial No, M7340. (N0 model.)

To all whom it may concern:

Be it known that I, GEORGE W. BANKS, of Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented a new and usefulImprovement in Grippers for JobPresses, of which the following is afull, clear, and exact description.

My invention relates to an improvement in grippers especially adaptedfor attachment to job-presses, and has for its object to provide a meanswhereby the grippers may be set Without the aid of a wrench or similartool, and also whereby when set they will be retained in apositively-fixed position upon the gripper plate and rendered incapableof lateral movement until purposely adjusted.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a partofthis specification, in which similar figures of reference indicatecorresponding parts in all the views.

Figure 1 is a front elevation of the device applied to the platen of ajob-press. Fig. 2 is a side edge view of the device detached. Fig. 3 isa transverse section on line 3 3 of Fig. 2, and Fig. 4 is a perspectiveview of one of the gripper-arms, the view being taken from the underside thereof.

In carrying out the invention the gripperplate 10 is provided withpreferably two 1011- gitudinal slots or openings 11, one at each side ofits center, and in the upperface of the said plate a series oftransverse teeth or deep serrations 12 is produced. The gri per-arms 13,which may be either straight, curved, or angular, have longitudinalteeth or serrations 14 formed in their under sides at one end, as bestshown in Fig. 4, and an opening or aperture 15 at said toothed endextending through from the front to the rear.

In connection with each gripper-arm a bolt 16 is employed,the threadedends of the said bolts being projected upward through the slots 11 ofthe plate and through the apertures in the arms, the toothed surfaces ofsaid arms having previously been brought in contact with the toothedsurfaces of the gripperplate. The heads of the bolts contact with theunder face of the gripper-plate, and upon the upwardly-extendin gthreaded end of each bolt a winged nut 17 is screwed to a bearing uponthe arm immediately below it. It is evident that when the toothedsurfaces of the gripper-plate and arms are brought into engagement andthe winged nuts screwed down upon the arms it will be impossible forsaid arms to move laterally to the slightest extent, and that by turningback the winged nuts either gripper-arm may be readily adjusted sidewiseupon the plate. It is also evident that the nuts and arms may bemanipulated by the hands of the operator without the assistance of awrench or of a tool of like character, which has heretofore beenrequired, and, as the space in job-presses in which the wrench must beturned to adjust the gripperarms is very limited, when such a tool isemployed the hands of the operator are often injured. The possibility ofsuch results is removed by the improved construction set forth.

The gripper-plate may be attached to the platen 1S and tripped in anyapproved manner. I have shown one form of attachment in the drawings,consisting of journaling trunnions 19,1ocated at the ends of the plate,in sockets 20, secured to the sides of the platen,.the plate beingprovided, also, near one end with an arm 21, to be acted upon by thetripping mechanism of the press.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination, with the platen 1S, having twosockets or bearings 20, of the transverse plate 10, having end trunnions19, mounted in said sockets and provided with longitudinal slots 11, thegrippers 13, having apertured lower ends, bolts 16, passed upwardthrough slots 11 and the apertures in the grippers and provided withthumb-nuts 17, and the operating-arm 21, projecting from the bar 10,substantially as set forth.

2. A gripper-bar having a corrugated or toothed upper face 12, providedwith longitudinal slots 11, trunnions 19 at the ends of the plate, theoperating-arm 21, the grippers 13, having apertures 15 and longitudinalserrations 14 at the under side of their inner ends, registering,respectively, with the slots and serrations 11 12, and bolts 16, passedup through the slots and apertures and provided with thumb-nuts 17,substantially as set forth.

GEORGE IV. BANKS. lVitnesses:

STUART S. GRAVES, JACOB S. DUVALL.

